Support base of a liquid crystal display

ABSTRACT

A support base of a liquid crystal display includes a stationary part, a rotational part, an axial joint part and a catch device. A resilient device can be selectively joined to the support base. A lock jut can selectively move in a rotary recess for angular adjustment or engage with lock recess to make the liquid crystal display being parallel to the lower base during the rotational part rotating with the locating plate.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a support base of a liquidcrystal display and particularly to an improvement of the support baseof a liquid crystal display, in which a rotational frame is controlledwith an adjustment device to displace from a vertical direction to ahorizontal direction, such that the liquid crystal display can beparallel to the base plate to reduce the package volume during deliveryand, meanwhile, is possible for being hung up.

[0003] 2. Description of Related Art

[0004] Due to providing advantages such as light in weight, thin inthickness, less radiation, and etc., the liquid crystal display isgetting popular instead of the traditional screen display. Mostly, theconventional liquid crystal display is composed of a liquid crystalpanel and a lower base, which are vertically joined to each other. Inorder to secure the stability of the liquid crystal display, the lowerbase has a width thereof being a couple times of the thickness of theliquid crystal display to keep a stable gravity center thereof during anoptimal view angle (for instance, an angle between −5° to 20° withrespect to the vertical reference direction) of the liquid crystaldisplay being adjusted such that it is capable of free from falling downand hurting the expensive liquid crystal display. However, the size ofthe lower results in an extremely large volume during delivering theconventional liquid crystal display so that it leads to a tremendousincrease of delivery cost with a relatively less quantity of deliveredliquid crystal display.

[0005] Although there is a step less adjustable liquid crystal displayavailable in the market, an extremely large frictional torque value forthe rotating shaft thereof is set for assuring an effect of the displaypanel being located at any angular position stagnantly to avoid beingincapable of stagnantly positioning due to insufficient torque. Further,Even if the rotating shaft allows the display panel being possible to beparallel to the lower base and overcome the deficiency of excessivelylarge package volume, the excessively large friction torque frequentlymakes the user hard to rotate the display panel and it is very likely toresult in a loose rotating shaft in case of the rotating shaft beingforced to turn. Consequently, the liquid crystal display becomes hard tobe adjusted and positioned correctly.

SUMMARY OF THE INVENTION

[0006] The crux of the present invention is to provide a support base ofa liquid crystal display, which includes a stationary part, a rotationalpart, an axial joint part and a catch device. A resilient device can beselectively joined to the support base. A lock jut is provided toselectively move in a rotary recess for angular adjustment or engagewith lock recess and the liquid crystal display can become parallel tothe lower base during the rotational part rotating with the locatingplate.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention can be more fully understood by referenceto the following description and accompanying drawings, in which:

[0008]FIG. 1 is an exploded perspective view of a support base of aliquid crystal display according to the present invention;

[0009]FIG. 2 is a perspective view of the support base shown in FIG. 1;

[0010]FIG. 3 is another perspective view illustrating the support baseshown in FIG. 2 after adjustment;

[0011]FIGS. 4A and 4B are an exploded perspective view and an assembledperspective view of the support base according to the present inventionin another embodiment thereof; and

[0012]FIGS. 5A and 5B are an exploded perspective view and an assembledperspective view of the support base according to the present inventionin a further embodiment thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0013] Referring to FIGS. 1 to 3, basically a support base of a liquidcrystal display according to the present invention includes a stationarypart 1, a rotational part 2, an axial joint part 3 and a catch part 4.Further, a resilient device 5 is optionally adapted to the support base.

[0014] Wherein, the stationary part 1 is a bent frame and in order tohave a better support effect, it is preferable that two stationary parts1 are provided oppositely. A single stationary part 1 is described onlyhereinafter for convenience. The stationary part 1 at the bottom thereofhas a joint plate 11 with at least a fixing hole 111 such that thestationary part 1 can be fastened to a lower base of the liquid crystaldisplay and at the upper side thereof has an axial hole 12 for beingpassed through the axial joint part 3 with an upper arctic rim 13. Thearctic rim 13 at the front and the rear ends thereof has a front stopper131 and a rear stopper 132 respectively.

[0015] The rotational part 2 is a frame shaped body also and used forfixing the panel screen of the liquid crystal display such that thedisplay panel can rotate in accordance with the rotational part 2. Therotational part 2 has a transverse plate 21 with two ends thereof havinga spacing corresponding to a distance between the two stationary parts 1and perpendicularly extending an end plate 22 respectively. The endplate 22 is provided with a locating hole 221 for being passed throughwith the axial joint part 3. Besides, a stop projection 3 extendstransversely from an intersection of the transverse plate 21 and the endplate 22 to keep contact with the arctic rim 13 during displacing alongthe arctic rim 13. Hence, both the front and the rear stoppers 131, 132act as an initiating and a limiting positions of the rotational part 2.Further, the end plate 22 has one or more engaging holes 222 for joiningthe catch device 4.

[0016] The axial joint part 3 is a stem 13 with at least a lateralmilled plane 32 for passing through the axial hole 12 and the catchdevice 4. An end of the axial joint part 3 is an engaging end 33 such asa thread screw end for engaging with an urging piece 34 such that thestationary part 1, the rotational part 2 and the axial joint part 3 canbasically form a rotary shaft.

[0017] The catch device 4 is composed of a locating plate 41 and aretaining piece 42 and passed through by the axial joint part 3. Thelocating plate 41 has a plurality of radial rotary recesses 412 with alock recess 411 corresponding to each rotary recess 412 and is providedwith projections 413 corresponding to the engaging holes 222 in the endplate 22 such that the projections 413 can be inserted into the engagingholes 222 to allow the locating plate 41 and the rotational plate 2being coupled to each other. The retaining piece 42 at a lateral sidethereof has two opposite lock juts 421 being fixedly attached to thestem 31 and each of the lock juts 421 at the inner side thereof has arecess 422 for offering a proper flexibility. Hence, the embodimentshown in FIGS. 1 to 3, the locating plate 41 moves with the rotationalpart 2 and the axial joint part 3 and the retaining piece 42 are fixedlyattached to both sides of the stationary part 1 respectively.

[0018] Besides, in order to increase the frictional torque, a resilientdevice 5 can be disposed between the catch device 4 and the urging piece34 and the resilient device 5 is a set of disk springs illustrated inthe present invention. It is noted that the disk spring set being usedas the resilient device 5 is not a limitation and a coil spring or asolid spring can be used instead. Further, in order to rotate smoothly,an anti-wear ring 6 with lubrication grease coated apertures/recesses 61is added between the end plate 22 and the stationary part 1 to eliminatenoise effectively in addition to enhancing the lubrication. Further, awasher 62 can be provided between the resilient device 5 and the urgingpiece 34.

[0019] Referring to FIG. 2 again, while in operation, the rotationalpart 2 and the locating plate 41 can rotate synchronously in case of theuser rotating the liquid crystal display and the two lock juts 421 arein the rotary recesses 412 so that an optimal view angle such as −5° to20° (measured with respect to a reference position of the liquid crystaldisplay panel perpendicular to the table top). When a force exertscontinuously, the two lock juts 421 escape from the rotary recesses 412and displaces along the surface of the stationary plate 41 to allow thetwo lock juts 421 engaging with the two lock recesses 411 due to torquerelease during approaching the two lock recesses 411 and constituting astate as shown in FIG. 3, in which the rotational part 2 isperpendicular to the stationary part 1, so that an expected effect canbe obtained. This means the liquid crystal display is changed to ahorizontally disposed H shape from an inverted T shape as a horizontallyflat display, which can be hung up by way of a plurality of hanging holeat the lower base thereof.

[0020] Referring to FIGS. 4A and 4B, another embodiment of the presentinvention is illustrated. A rotating shaft 7 is used instead of both thepreceding rotational part 2 and the axial joint part 3. Wherein, therotating shaft 7 at an end thereof has a stem 71 with at least a milledplane 72 and an engaging end 73 which are the same as the axial jointpart 3, and at another end thereof has a support end 74 with at least aconjunction 741 such as a connecting hole so as to join the liquidcrystal display panel. The stationary part 1 at the axial hole 12thereof being changed to a circular hole and at least an engaging hole14 is provided. The locating plate 41 fits with the engaging hole by wayof the projection 413 thereof so as to be fixedly attached to the axialhole 12 at an end thereof. Further, the retaining piece 42 at the centerthereof is passed through with the stem 71 so as to move with therotating shaft 7. Hence, the retaining piece 42 can rotate with therotating shaft 7 synchronously as soon as the rotating shaft 7 and canselectively make angular adjustment in the rotary recess 412 or engagewith lock recess 411 to allow the liquid crystal display being parallelto the lower base.

[0021] In order to limit the rotation of preceding embodiment, a limitplate 8 is provided between the rotating shaft 7 and stationary part 1to be passed through by the stem 71 and moves with the stem 71. Thelimit plate 8 at a lateral side extends a lateral projection 81 tocontact with the arctic rim 13 and move along with the front stopper 131and the rear stopper 132 as limits during the rotating shaft 7 rotating.

[0022] Referring to FIGS. 5A and 5B, a further embodiment of the presentinvention is illustrated. The stationary part 1 at the top thereof canbe provided with two sets of opposite lock recesses 15 and rotaryrecesses 16, which are disposed on the locating plate under theallowable structural stress. The rotating shaft 7 is the same as thatshown in the second embodiment so that the stem 71 thereof can pass overthe circular axial hole 12 and the elongated oval hole of the retainingpiece 412 so as to move with the retaining piece 412. When the rotatingshaft 7 rotates with the retaining piece 42, the retaining piece 42 canbe selectively made angular adjustment in the rotary recess 412 orengaging with the lock recess 411 so as to allow the liquid crystaldisplay being parallel with the lower base.

[0023] Besides, in order to enhance the lubrication between the rotatingshaft 7 and the stationary part 1, an anti-wear ring 6, which moves withthe rotating shaft 7, can be disposed in between.

[0024] It is appreciated that the support base of a liquid crystaldisplay according to the present invention provides a retaining piecewith two engaging juts to selectively move in two rotary recesses orengage with two lock recesses during a rotational part or a rotatingshaft rotating on the stationary part so that the liquid crystal displayconnected to the rotational part or the rotating shaft can be adjustedto be parallel with the lower base underneath in addition to offering anadjustment of tilting forward or backward for a best view angle. Hence,not only the package volume can be reduced greatly but also the deliverycost can be lowered down with increasing the delivery quantity.Furthermore, the traditional inverted T shaped liquid crystal displaycan be changed to a horizontally disposed display for being possible tohang up.

[0025] While the invention has been described with reference to thepreferred embodiments thereof, it is to be understood that modificationsor variations may be easily made without departing from the spirit ofthis invention, which is defined by the appended claims.

What is claimed is:
 1. A support base of a liquid crystal display,comprising: a stationary part, being a frame attached to a lower baseand having an axial hole at a top thereof; a rotational part, being aframe also, having a transverse plate joined to the liquid crystaldisplay, and perpendicularly extending an end plate with a locating holeat two ends thereof respectively; an axial joint part, having a stemwith at least a milled plane passing through the axial hole and thelocating hole and having an engaging end to connect with an urgingpiece; and a catch device, being composed of a locating plate and aretaining piece, the locating plate being passed through with the stemand fixedly attached to a side of the end plate and proving at least aradial rotary recess and a lock recess disposed circumferentially, andthe retaining piece being passed through with the stem also and beingfixed at an end of the stem with at least a lock jut facing the locatingplate; whereby, the lock jut can selectively move in the rotary recessfor angular adjustment or engage with lock recess to make the liquidcrystal display being parallel to the lower base during the rotationalpart rotating with the locating plate.
 2. The support base of a liquidcrystal display as defined in claim 1, wherein a resilient device can beprovided between the catch-device and the urging piece.
 3. The supportbase of a liquid crystal display as defined in claim 3, wherein theresilient device can be a set of disk springs, a coil spring or anyequivalent solid spring.
 4. The support base of a liquid crystal displayas defined in claim 1, wherein the end plate has at least one or moreengaging holes and the locating plate has corresponding engagingprojections for the end plate and locating plate being coupled to eachother.
 5. The support base of a liquid crystal display as defined inclaim 1, wherein the lock jut at an inner side thereof has a recess foroffering a proper flexibility.
 6. The support base of a liquid crystaldisplay as defined in claim 1, wherein an anti-wear ring with greaseholes or grooves is arranged between the stationary part and the endplate.
 7. The support base of a liquid crystal display as defined inclaim 1, wherein the stationary part at a top thereof has an arctic rimwith a front stopper and a rear stopper and the rotational part at anintersection of the transverse plate and the end plate thereof has astop projection to keep contact with the arctic rim to be limited by thefront and the rear stopper during rotating.
 8. A support base of aliquid crystal display, comprising: a stationary part, being a frameattached to a lower base, having at least a lock recess and a rotaryrecess vertically disposed at a top thereof and having an axial hole atthe top; a rotating shaft, having a stem with a milled plane passingthrough the axial hole at an end thereof, the stem having an engagingend for connecting with an urging piece, providing a support end atanother end thereof for being fixedly joined to the liquid crystaldisplay; and a retaining piece, being disposed at an end of thestationary part, passed through by the stem and moving with the stemwith at least a lock jut facing the stationary part; whereby, the lockjut can selectively move in the rotary recess for angular adjustment orengage with lock recess to make the liquid crystal display beingparallel to the lower base during the rotating shaft rotating with theretaining piece.
 9. The support base of a liquid crystal display asdefined in claim 8, wherein the stationary part at the lock recess andthe rotary recess vertically disposed at a top thereof further providesa locating plate fixedly attached to an end of the stationary part. 10.The support base of a liquid crystal display as defined in claim 9,wherein the stationary part has at least one or more engaging holes andthe locating plate has corresponding engaging projections for thestationary part and the locating plate being coupled to each other. 11.The support base of a liquid crystal display as defined in claim 8 or 9,wherein a resilient device can be provided between the retaining pieceand the urging piece.
 12. The support base of a liquid crystal displayas defined in claim 11, wherein the resilient device can be a set ofdisk springs, a coil spring or any equivalent solid spring.
 13. Thesupport base of a liquid crystal display as defined in claim 8 or 9,wherein the lock jut at an inner side thereof has a recess for offeringa proper flexibility.
 14. The support base of a liquid crystal displayas defined in claim 8, wherein an anti-wear ring with grease holes orgrooves is arranged between the stationary part and the rotating shaft.15. The support base of a liquid crystal display as defined in claim 9,wherein the stationary part at a top thereof has an arctic rim with afront stopper and a rear stopper and the rotating shaft fits with alimit plate, the limit plate rotating with the rotating shaft andextending laterally a side projection to keep contact with the arcticrim and to be limited by the front and the rear stopper during rotating.